<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Document</title>
	<style>
		*{
			margin: 0;
			padding: 0;
		}
		
		header {
			width: 100%;
			height: 80px;
			background-color: rgba(0,0,0,.2);
		}
		
		.banner {
			width: 1200px;
			height: 1000px;
			background-color: #ccc;
			margin: 10px auto;
			box-sizing: border-box;
		}

		.bt {
			height: 400px;
			background-color: #666;
		}

		.bt img {
			height: 400px;
			width: 600px;
			float: left;
		}

		.bt-lone,.bt-ltwo {
			width: 300px;
			height: 400px;
			float: left;
			background-color: yellow;
		}

		.bt-ltwo {
			background-color: green;
		}

		.bm {
			height: 400px;
		}

		.bm-one,.bm-two,.bm-three,.bm-four {
			width: 300px;
			height: 400px;
			background-color: skyblue;
			float: left;
		}

		.bm-two {
			background-color: purple;
		}

		.bm-three {
			background-color: blue;
		}

		.bm-four {
			background-color: #ff3040;
		}
	</style>
</head>
<body>
	<header>
		
	</header>
	<div class="banner">
		<div class="bt">
			<img src="1.jpg">
			<div class="bt-lone">
				
			</div>
			<div class="bt-ltwo">
				
			</div>
		</div>
		<div class="bm">
			<div class="bm-one">
				
			</div>
			<div class="bm-two">
				
			</div>
			<div class="bm-three">
				
			</div>
			<div class="bm-four">
				
			</div>
		</div>
	</div>
</body>
</html>